Tennis has that laser technology... that could help with out of bounds calls, making the referees jobs easier.

Where are you going to put the laser on the court? Usually the sidelines and baselines are packed with cameramen and people who bought sideline tickets. Also, it's common to see players on the bench jump up and down in excitement and sometimes even onto the court. I really want this to hapen, because it's so hard to tell from three different angles if a player is out of bounds.